106. Curie is a unit of

1. 1. Energy of gamma rays

   
   
   

   2. Half-life

   
   
   

   3. Intensity of gamma rays

   
   
   

   4. Radioactivity

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---

107. Particles which can be added to the nucleus of an atom without changing its chemical properties are

1. 1. Electrons

   
   
   

   2. Protons

   
   
   

   3. Neutrons

   
   
   

   4. α-particles

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

---

108. Which of the particles has similar mass to that of the electron ?

1. 1. Proton

   
   
   

   2. Neutron

   
   
   

   3. Positron

   
   
   

   4. Neutrino

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

109. When the speed of electrons increases, then the value of the specific charge on an electron

1. 1. Increases

   
   
   

   2. Decreases

   
   
   

   3. Remains unchanged

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

---

110. The cause of fractional atomic weights of elements is the presence of

1. 1. Isobars

   
   
   

   2. Isotopes

   
   
   

   3. isotones

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---